Lath-board.



s. M. FORD.

LATH BOARD APPLICATION men JAN-"10' 1916.

1 ,1 88,536 I Pqtented J u ne 27,1916.

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S. M. FORD.

LATH BOARD.

' 1 P entedJunezz 1916.

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zen of the United States,

srrasmronn, or snruufn, mmnnsom.

LATE-BOARD.

To all whom it may concern Be'it known that I, SILAS M. FORD, a citiresiding at St. Paul, in the county of Ramsey-and State of Minnesota, have inventedcertain new and useful Improvements in Lath-Board s, of which the following is a specification.

'. My invention relates to improvements in lath-board of waterproofedpaper or other flexible sheeting designed to be fastened to the studding or beams of buildings to serve as a foundation for plaster, and corrugated to form :iath' like projections and interme- The lath board is most conveniently made.

diate depressions or valleys, the valleys on one side forming air spaces and'the valleys on-the other side forming plaster receiving aces.

in large, sheets which can be rolled or packed for shippin and afterward cut to the size and shape esired in use.

It is the object of the inventionto provide improved means for binding the corruga:

' tiolis together and holding them to form,

so tha tthey will not spread apart'or become crushed or flattened in use or handling, with a the consequent impairment of their capacity as air-containing-or plaster receiving spaces. With this object in View I have provided.

transverse bindi'ng strips secured at intervals across the face of the board and having pressure resisting instrumentalities extending inwardly into the valleys,,-and prefer-.

1 ablythroughtheboarditself, in position to abut against one or bothof the sides of the projections and so resist the la'teral thrust of the same when they are. under compres- .sive or lateral pressure.

- More particularly the invention consists in the construction, combination, and ar-" rangement ofparts hereinafter described and claimed.

1' In. the accompanying drawings forming part of this. specification, Figure 1, is

- board embodying a binding strip I with abutment prongs which plerce the perspective view of a fragment of lath? formed board; Fig. 2 is an end view ofthe same; 3is an end View of the same provi ed With a backing sheet through which the prongs are passed; Fig. 4 is a perspective view. of the preferred form of binding strip; Fig. 5 is a perspective iview' of a modified form of binding strip Fig. 6 is a perspective .view of a fragment of lath' Specification of Letters Patent. I Application filed January 10, 1916. Serialilfl'o. 71,311;

waterproofed paper,

receiving spaces,

, air

transversely across the face 7 tions at suitable lntervals apart and carry; pressure resistlng 1n-l lath projections 3. After Patented June 27, 1916.

board wherein -the"abutrnent prongs sup-. port one side only of each lath projection; Fig. 7 1s a perspective view of a fragment of lath board wherein the abutment instrumentalities do not extend into the lath board itself Fig. 8 islaview,'partly in endelevatlon,

and partly; in ectiom'of afragment of board wherein the abutment instrumentali-.

ties consist of .pins or-nails extending through the strips .and- Fig. 9 is agsimilar view where the abutment instru'mentalities consist of staples.

The lath board to. lates is made. of flexible sheeting, preferably :pressed or molded to form corrugations or alternate projections and depressions or valleys: so that the depressions on one side will formthevalleys on the other side and vice'yersa. I prefer to form the corrugations in=.fplaits, asit were, of keyed lath shape, as shownis the drawings, where 2 represents the} lath projections on one side. of the board andj' 3 the lath projections on the other sidei z- Between the lath projections 2 are interfn'riediatevalleys r depressions 4 formed by "stamping up the lath 'projections'3 on the othfeipside of the board, and there are similar depressions or valleys 5' between the "lath projections .3, these valleys 5 .being' formed stamping up the projections 2. The valleyis orlongr tudinal channels 4 which are. open on, the plastering face of the board serve as plaster.

valleys or channels 5 under the hollow stamped up. lathprojections 2 serve asdead heat insulating and "sound deadening spad's.

crushed or flattened in use, videkeys for the plaster, sheet metal binding strips lateral abutment or strumentalities which extend into the valv In the form shownlin Figs. 1 to 4 of the drawings the strips areprovided with while the oppositely. facing.

and thus serve to secure the strips thereon.

which this invention re- 'I ojhold-the lath projections to-form so that. they will. not spread apart or become as well as to pro-"K I have provided 6 which extend 1 of the corr uga-Q.

leysand may themselves piercev the board stamped up prongs 7 adapted to enter the valleys 4 and pass through the face .of the piercing the lath projections the ends of the prongs may be against the opposite ,ley or depression upset and clenched as shown in Figs. 1', 2, and 3. In Fig. 3 of the drawings the board is shown provided with a backing sheet 8 through which'the prongs are'passed and clenched, but the backing sheet may, if desired, be secured to the corrugated board by asphalt or other suitablebind'er independently of the prongs 7. The prongs are arranged in pairs and are spaced apart to correspond with the valleys of the board so" that the prongs of each pair will bear side edges of the two adjacent projections. Thus when the board' is subjected to pressure the side edges of the lath projections will be opposed and held by the prongs so that the projections will be' prevented 7 from spreading and being crushed in.

In Fig. 6 of the drawings is shown a modified form wherein the-binding strip is provided with only one prong for each; val 3, so that only one side of each lath projection 2 will besupported by a-prong.

In Fig. 7 is shown another modification wherein the board is provided witha backing sheet 8, and the prongs 9 of the strip 6 arenot long enough to pierce the corrugated board, but merely enter the valleys, like the prongs 7, in position to abut against the side. edges of the lath projections. In this case it is necessaryto secure the strips to the corrugated board by independent fastening means, such as the pins 10 or staples 11, which may also pass through the backing sheet and form a means of securing the corrugated board to the backing sheet.

In Figs. 8 and 9 are shown modifications wherein the abutment prongs, instead of being stamped up from the strips 6, consist'of independent pins 12 or staples 13 passing through the strips and driven through the corrugated board, and also, if desired, the backing sheet with their ends clenched or upset.

The pins 12 and staples 13 extend into the valleys in position to abut against. the opposite side edges of the adjacent projections similarly to the prongs shown in Figs. 2 and 3,'butit will be understood that, if desired, they can be so arranged as to abut against one edge only of these projections similarly to the prongs shown in Fig. 6. Thus the transverse strips above described. with their prongs extending into the Valleys of the corrugations and confining the o posite sides of the keyed lath corruga ions serve effectually to keep the corrugations to form by opposing the lateral thrust of the corrugations-when the same are subjected to crushing pressure, and also serve to bind'the corrugations together. And when the prongs pass through the corrugated sheet or backing board they .also serve most eilicaciously to prevent this spreading of the prongs is meant that the prongs are either normally in contact with the sides of the projections or close enough to them to oppose their lateralthrust when they are subjected to'spreading force or crushing pressure.

I claim:

1. A lathboard comprising a sheet of-flexible material corrugated to form lath projec tions and intermediate valleys, and binding strips extendi transversely across the face of the projections and having prongs extending into the valleys andforming lateral supports for the projections.

2. A. lathboard comprising a sheet of flexible material corrugated to form interspace d lath projections and intermediate valleys, binding strips extending transversely across the face of the projections, prongs depending from the binding strips and projecting i down into the valleys in'positionto form lateral supports for the projections and extending through the board at'the bottom of the valleys.

3. A lathboard comprising a. sheet of flexible material corrugated to form interspaced projections and intermediate depressions, binding strips extending transversely across the face of the projections, and prongs carried by the binding strips at intervals corresponding to sides of adjacent projections and extending into the depressions .so as to abut against both -sides of said projections, whereby to form lateral supports on each side thereof.

4. A lathboard comprising a, sheet of flexible material corrugated to form interspaced projections and intermediate valleys, binding strips extending transversely across the face of the projections, and prongs carried bythe binding strips and extending into the valleys so as to abut against both sides 'of'said projections, whereby to form lateral supports on each sidethereof and extending through the board at the bottom of the valleys. i

5. A lathboard comprising a sheet of flexible material corrugated to form interspaced projections of keyed lath shape and intermediate valleys, binding strips extending transversely across the face of the pro ections, and prongs carried by the binding strips and projecting into the valleys in position to, abut against both side edges of said keyed lath projections, whereby to form lateral supports on each side thereof.

6. A lathboard comprising a sheet of flexible material corrugated to form keyed lath shape projections and intermediate valleys, binding strips extending transversely across the face of the projections, and prongs dethe distances between the said prongs extending into the valleys and 10 forming lateral supports for the' sides of the projections.

In testimony whereof I aflix my signature in presence of two Witnesses.

' SILAS M. FORD. I 1 Witnesses: ARTHUR P. Lornnor, H. SWANSON. 

